ESTIMATiON OF HETEROSIS AND COMBINING ABILITY IN SOME BREAD vIHEAT CROSSES (T. aestivum L.) | ||||
| Journal of Plant Production | ||||
| Article 3, Volume 30, Issue 2, February 2005, Page 755-762 PDF (129.4 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jpp.2005.237124 | ||||
 View on SCiNiTO | ||||
| Author | ||||
| H. S.A. El-Borhamy, | ||||
| National Wheat Research Program, Field crops Research Institute, ARC | ||||
| Abstract | ||||
| Six wheat genotypes of diverse origin were crossed in half diallel combinations in 200212003m 2003/2004 season1 the 15 F crosses and their six parents were grown ¡n a field experiment at Sakha Agricultural Research station, Agricultural Research center, Egypt, in a randomized complete block design with four replications. The experiments aimed to study heterosis and combining abUity for heading date, maiurity date, plant height, no. of spikes/plant, no. of grains/spike, 100- kernel weight, spike weight, grain yield/plant, flag leaf area and ciorofel Atb.content the results are summarized as follows. 1- Highly significant differences for most traits were obtained among the studied genotypes (parents and crosses). General and specific combining ability mean squares were highly significant for ail studied traits 2- The best general combiners for grain yield and one or more of its attributes were line2 and sids while the best general combiners for earliness were line I , line2and line 3. 3Positive heterosis effects relative to the mid-parent were found for most of the tr&ts in the crosses 3x4, 2x5 and 1x3. 4- The gca/sca ratio revealed the importance of Non-additive genetic variance in the inheritance of all traits, except heading date and no. of grains/spike. 5- The results of specific combining ability effects, revealed that the cross line 1 x line 4 was the top performing ¡n maturity date, plant height and grain yield! plant. | ||||
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